Attachment for a handlebar



FIG. 1 is a perspective view of the attachment for a handlebar.

FIG. 2 is a side view of the attachment for a handlebar of FIG. 1; and,

FIG. 3 is a top view of the attachment for a handlebar of FIG. 1.

The throttle sleeve and grip portions of the attachment for a handlebar shown in broken lines form no part of the claimed design. 

The ornamental design for an attachment for a handlebar, as shown and described. 